Tetramethyl Orthosilicate CAS 681-84-5 Organosilicon Compounds C4h12o4si

• Customization: Available
• CAS No.: 681-84-5
• Formula: C4h12o4si
• Model NO.: 681-84-5
• EINECS: 211-656-4
• Environmental Protection: Yes
• Certification: ISO 9001
• Color: Transparent
• Appearance: Liquid
• Type: Impact Modifier
• Usage: Daily Use Chemical
• Transport Package: 200kg/Drum
• Specification: 1CBM
• Trademark: Sincere Industries
• Origin: China
• HS Code: 29209085
• Production Capacity: Over 6000 Tons/Year

Product Description

Product Description

 

Tetramethyl orthosilicate is the chemical compound with the formula Si(OCH3)4. This molecule consists of four methoxy groups bonded to a silicon atom.
Two common organic precursors are tetraethyl orthosilicate (TEOS) and tetramethyl orthosilicate (TMOS). The latter is more toxic than the former.
Tetraethyl orthosilicate (TEOS), Si(OC2H5)4, is the first alkoxide of the series, followed by tetramethyl orthosilicate (TMOS), Si(OCH3)4, which is, however, less safe to handle and hydrolyzes faster than TEOS.
The hydrolysis of TMOS is, in fact, around six times faster: in general, a lower hydrolysis rate is associated with an increase of the organic group size in the silicon alkoxide. The properties of the silicon alkoxides change according to the dimension of the alkoxy; larger groups produce an increase in molecular weight, viscosity, and boiling point and a decrease in density of the alkoxides.
 

 

 

Tetramethyl orthosilicate Chemical Properties

Melting point	−4 °C(lit.)
Boiling point	121-122 °C(lit.)
density	1.023 g/mL at 25 °C(lit.)
vapor density	5.25 (vs air)
vapor pressure	3.35 psi ( 20 °C)
FEMA	3185 | METHYLATED SILICA
refractive index	n20/D 1.368(lit.)
Fp	84 °F
storage temp.	Store below +30°C.
form	liquid
color	colorless
Specific Gravity	1.032
explosive limit	0.88-23.8%(V)
Water Solubility	hydrolysis
Sensitive	Moisture Sensitive

 

Safety Information

 

 

Safety Information

Hazard Codes	T+
Risk Statements	10-26-37/38-41
Safety Statements	16-26-36/37/39-45-28A
RIDADR	UN 2606 6.1/PG 1
OEB	B
OEL	TWA: 1 ppm (6 mg/m3)
WGK Germany	3
RTECS	VV9800000
F	10-21
Autoignition Temperature	245 °C
TSCA	Yes
HazardClass	6.1
PackingGroup	I
HS Code	29209085

Uses

Tetramethyl orthosilicate (TMOS) is popularly used in the sol-gel synthesis of silicates1 and chromium-doped silicates and in the formation of hexagonal mesoporous silica layers.
Tetramethyl Orthosilicate is a compound used in the research of the multifunctionality of silicified nanoshells and the efficiency at adsorbing cadmium ions at cell interfaces.
Coating screens of television picture tubes; mold binders; corrosion-resistant coatings; catalyst preparation; silicone intermediate.

 

Our Advantages

 

Quick Response:
Professional and enthusiastic sales teams will respond to your inquiry carefully and timely. Sales personnel have the foundation of the chemical industry and international trade so you are professional and respected for each communication experience.

Superior Quality:
More than 24 years of experience in the chemical industry 
Quality inspectors of chemical engineering strictly control the quality of each order. Support third -party inspection before delivery.

Fast Delivery:
Professional production equipment and reasonable production plans to ensure that orders are delivered quickly and timely.
 

 

FAQ

 

1. Can I get samples?
Yes, free samples are available. Only need to pay for shipping.
Samples will usually be sent out within 1-3 working days.

2. Do you accept customized orders?
Yes, both product and package can be customized.
 
3. What is the payment terms?
TT, LC, DP are available.
Please note that OME orders require payment prior to shipment.

 4. What is the lead time for mass production?
Delivery time depends on product type and quantity.
Our company has a digital ordering system to ensure scientific and reasonable scheduling of orders, please consult the sales staff you contacted.

 5. How to guarantee the product quality?
Sincere Industries has a complete raw material inspection, quality control and pre-factory inspection system to ensure that the order delivered to you is in line with the contract.
In addition, it also supports third-party inspection before shipment. If the inspection fails, the customer's payment will be refunded, and the loss caused by the breach of contract will be compensated.

6. How to check the order status after payment?
After the order is confirmed, the merchandiser will follow up every week and update the order status to you by email.

7. How to deal with after-sales problems?
The after-sales service implements the order responsibility system, and the salesman is the first responsible person for the order. The after-sales service department will set up a service team after receiving the complaint. They will complete the incident investigation and provide you with a resolution within 72 hours.
 

Company Profile

 

Sincere Industries Co., Ltd., established in 2021, is located in the Huarun Mansion, Longhua District, Haikou City, Hainan Province, boasting a brand-new, ultra 5A-level office environment. Based on the profound corporate culture of Shijiazhuang Chenghexin Chemical, which has more than 20 years of experience, the company fully supports the development of import and export-related businesses for its Hainan branch. The company has a harmonious atmosphere, generous benefits, and offers substantial room for growth.

Since its inception, the company has always adhered to the development philosophy of "integrity, stability, innovation, and precision". It continuously explores and innovates, enhancing the R&D and production capabilities of new products. The company's products are constantly optimized and perfected, and it maintains long-term stable cooperation with domestically powerful factories as well as national and provincial scientific research institutes. This ensures that the products' technology is advanced, quality is stable, and prices are competitive, now forming a professional chemical raw material supply enterprise that combines science, industry, and trade with both domestic and international trade.

In recent years, the company has won several national and provincial awards and titles for being a trustworthy enterprise and has been recognized as a quality and efficiency-oriented enterprise. It has also received accolades and recommendations from internet companies like Baidu, and HC; particularly, it has been featured in a special interview and promotion by the CCTV Securities Information Channel's "Brand Power" program.

After more than 20 years of efforts, the company has continued to grow and expand. Its client base includes highly influential local enterprises, listed companies, and Fortune 500 companies, earning long-term trust and support from both new and old customers. With a bright future ahead, all employees are confident in the company's development.